Cr4Mo4V钢是一种综合性能极佳的高合金钢,具有高疲劳寿命,高高温硬度,高强度和高韧性等优点,是我国目前最常用的一种航空发动机高温轴承用钢。随着航空技术的发展,航空器的飞行速度不断提高,需要发动机的推重比越来越高,发动机轴承工作载荷越来越大,转速越来越快,环境温度越来越高。轴承服役寿命不足已经成为 Cr4Mo4V steel is a kind of high alloy steel with excellent performance. It has the advantages of high fatigue life, high temperature hardness, high strength and high toughness. It is the most commonly used high temperature bearing steel for aeroengine in our country at present. With the development of aviation technology, the flying speed of the aircraft is constantly increasing, and the thrust-weight ratio of the engine needs to be higher and higher. The working load of the engine bearing is getting larger and larger, the speed is getting faster and faster, and the ambient temperature is getting higher and higher. Bearing service life has become inadequate